Switch.



c. cARsoN.

SWITGH. PPLOATIQNVHLBD 1120.21.1906( Patented 0G11.v 12, 1909.

QINyENToR ATTORNEY' lo.. g3

was man Inc.. umm, Hummm ic.

' of Wilkinsburgfinfthe; county'- of" Allegheny and-@Stateof'iPennsylvania, have invented al CLARENCE CARsoN, or WiLKiNsBURG,PENNSYLVANIA; Ass'IGNo'n 'ro WESTINGHCUSE" EnECJrEiQ-q, MaNUrACrUnINeCQiaPANx Aconronir'ri'oN OE'PENNSYLVANIA.

Toalligvhmmtt'mayvcoacem: peint-#known "that EI, CLARENCE CARSON, acltizerifoftli'e'fUnited States, and a resident newfantlfnsefil'Imrovement in Switches,

'of 'which ftlief following risaspecification.l

' invention" relates to devices formal:`

ingfand'fbreakingj electric circuits, and has lspecial reference toswitches which are attaehedtothe' freeends' of exible pendent u .and

'Morett 'relatively'sinall machinery, such as fan' moeabieszTiefebene-ef m invention is to yprovide a device of the* character'above indicated that vsliallli ve i'idfjieliable in operation. BmitlentWitchesl'liave been largely eninne'c'tion with electric lights,

tors', lelect'ri/cal measuring instruments #for testing 'puiposesfand,"as heretofore constructeol, switches have usually been breaking thecircuit. 'According tdiiiypiesent invention, I provide a switch`adzMipted'for the aforesaid uses Whiohl is fp osit 7e fii'io'perationwhich provides arelatively lar' Ie air gap between thecurrent-carryingpar s when the switch is opeiilandfivliiclrfis providedwith al single operating buttonor other 1neans,- successive operationsof which effect the openinf-l zand` sive, rare f, detail views of thestructure .shown in Figs'. land2. Figs. 12 and14 are views, similar`'tof Flgiiffl, @of modified .forms o t switching devices lwhich areincluded witli-in. the scope of my invention, anclFigs.- 9, 1 0,-` 11andv .13r 4are t detail @views ofthe strncti'ufe shown Fig.' i12.

vSim'lai" f` parts are the fsitiehilheije illustrated comprises, altubei Specicationiovf Letters Patent. l Appliatin met December 27, 190e.*serial No. 349,709;

]e s iinple'-''and` compact in construction.

fopen-y v ei'id o vtl .movement-bwwpim@ Si PAiacrosstheetttloeffionearone end and engages- 5 0 1 which forms thecasingfof the .device and` longitudinalslots 19 in the opposite sides of100 Patented oet.y 1e,' 1eoo one end of .whichispartially closed, Jan'in-l sulating-ilbiishin'g .2, an A#insulating 'block 3,

stantionary springt-contacts Land 5,-:1 rotatable bridging -contact `fnen'iberf Wand'- means for fmoving the bridging contactmember into andtout of engagement-'ywithfl the spring contacts. fl-hebodyoffftheinsulating biishing 2 is'tte'dii'ito vtheftul'ie1- andv a projection therefrom extendsV tliroughfanopenf" ing 8in the partially closed'end vofthe tube.

The insulatingjbloclr whichis, general, f of '.a l cylindricalFforimfni'ay be ,secured Vin Y' position 'by -a'set soretv34 y'and isprovided 'Y with longitudinal slots 9 through which the, 'springcontacts 4 and' 5 extend, "and-a' silb- `sta`ntially rectangular endprojection 10 to. 'which these contact members are attached.

'by screws `llfor by other suitable means. The vslotfst) aresufficient-1y deep and the projection 10 suficientlynarrow to`materially separate the Contact members Land 5 from the interior wallsof the inclosing tube 1,.

which may be of .conducting material. A shaft 12 is rotatablyA'mounted'1niol-waybev tween the free ends of the contactine-mbers" 4 and5,'its centerline beingv perpendicular to and iii-jther plane of theaxsof the tube.

The bridging Contact Vmember (5 is substantially elliptical inform andis rigidly atthis member from a position of engagement with thespringcontacts 4 and 5,' out of Contact therewith, so that material air gapsexist betweenftlieispringcontacts and the plates I3 Yivlii ed, l-Witbetween thezstoplSand the closed end of the inner' tube andnormallyseparates the tubes'as far asthe stop will permit. ,A spring pawl 21. isattached tothe closed end of the inner tube 17 and lprojects inwardlytherefrom so that a relatively slight inward -movement of the tube 17will cause a 90 y movement of the bridging contact member 6` byreason ofthe engagement of the 'innerl end ofthe spring pawl with the. ratchet16. In" this way, successive actuationsiof the inner tube 17, inopposition vto the spring 20, will open and close the switch. Theyiiexible conducting leads may be brought in through a hole 22 in thebushing 7 and the electrical connection ,may be made tothe contacts 4and 5 by means of screws 2 3. -The tube 1 is provided with an insulatinglining adjacent to the point of connection with the leads so that thepossibility of short-circuitingthe switch is reduced to a minimum.

eferring particularly to Figs. 9, 10 11, 12 and 13 of the drawings, aninsulating block 24, which is substituted for the block 3 of, Fig. 1, isadapted to support two in stead of one pair of spring contact members 25and 26 in order to interrupt both sides of the circuit when the switchis open, said members. being held in engagement with each other, whenV,the switch is closed, by meansf a block l27 of insulating materialwhich is substituted for the bridging contact member Shown in Fig. 1'.'Figs. 9, 10 and 11 are detail views of the insulating block 24, and Fig.13`is a detail View of: on'e of the contact members 25. The opera-y tionof the modified structure is similar to that of Fig. 1 and will bereadily understood from the foregoing description.

Referring especially to Fig. 14, a tube 28,-

helical spring 32 is interposed between the walls of the vtubes 1 and 28and is held in position by the flanges 30 and 31. A; spring pawl 33,which corresponds to the pawl `21 of Fig. 1, is adapted to effect therotation of the bridging contact member y6 by engagement with the teethof the ratchet disk 1G when an outward pull is exerted upon the tubeA28. In order that the moving parts maybe disclosed for inspection, theenlargement 29 of the tube 28 is preferably composed of two separableparts, one of whichI forms an end cap 34 to which the spring edwithoutdeparting from thespirit of my invention. I

I 'claim as my mvention:

1. In a pendent switchforelectric circuits, the combination with a tubepartially closed yat oneend, an insulating block seated in and supportedby the partially closed end, a second tube movably fitted into the openend of the first 'tube and having longitudinal slots, a cross pinsupported by the iirst tube and projecting through said longitudinalslots, a springvwhich tends to separate the tubes, a pair'of springcontact lingers attached to theinsulating block, a `shaft rotatablymounted between thefngers, and a. bridging Contact member and aninsulating ratchet disk. 4attached 'j to the "shaft, of a spring pawlextending inwardly from the outer end of the inner tube and adapted toengage the ratchet disk.

2. 1n a pendent switch for electric circuits,

the combination with a tube partially closed f at one end, an insulatingblock seated in and supported byy the partially closed end,`a secondtube movably itted into lthe open end of 'the lfirst tubeand having loitudinal slots, a crosp pin supported by the first tube and projectingthrough said longitudinal slots, a spring which tends' to separate thetubes, a pair of s ring contact fingers attached to the insu atingblock, a shaft rotatably mounted between the fingers, and a bridgingcontact member and an insulating ratchet disk attached to the shaft, ofa.

spring pawl extending inwardly from the outer end ofthe inner tube andadapted to engage the ratchet disk, and means for accentuatingthequadrature positions of the bridging contact member.

3. In a pendent switch for electric circuits, the combination with atube partially closed at one end, an insulatin block seated in and suorted by the parta ly closed end, a seco tube movably fitted into theopen end of the first tube and having a 'slot and pin connection withthe first tube, a spring which tends to separate the tubes, a pair ofspring contact fingers attached to the insulating block, a shaftrotatably mounted between the fingers, and a bridging contact member anda ratchet disk attached to the'shaft, of a spring pawl extendinginwardly from the outer end of the inner tube and adapted to engage the'ratchet disk. 4

supported by the partia ly closed end, a second tube mpvably fitted intothe open .end of the first tube and having a slot-and pin 12o 4. In apendent switch for electric circuits, the combination with a tubepartially closed at one end, an insulatin block seated in and connectionwith the first tube, a Sprin which l centliating the quadraturepositions of the 10 tends to separate the tubes, a. sur o springLbridging Contact member. Contact fingers attached to t e insulating Intestimony whereof, I have hereunto block, a shaft rotatably mountedbetween 5 subscribed my name this 21st day of Decemthe fingers, and abridging contact member ber, 1906.

und n, ratchet disk attached to the shaft, of i CLARENCE CARSON. aspring pawl extending inwardly 'from the Witnesses: enter end of theinner tube and adapted to `O'r'ro S. Sonruunxa engage ilieratchet disk,and means for ac-` Bumm' I-IlNEs.

